New lifters

[Bob]

What is the proper procedure for new hyd lifters? Pre-load? If pre-load, how do you do that?
Thanks
Bob

[lisiecki1]

i was taught to let them sit in oil covering them overnight and drop them in like you would normally.  never heard anything about preload on hydraulic lifters.

[skip68]

I think you get them touching with no gap and then go 1/4 turn more.   

[aifilaw]

Pretty standard, drop them in a cup of oil for a minute and let them sit and soak. drop them in.
I generally use two methods to ensure I get it right for each lifter.
First grasping the head of the rocker at the valve-tip and bouncing it up and down while I slowly tighten the lash until I don't feel any free space. Then grasping the pushrod between two fingers and twisting it side to side as I loosen 1/2 a turn, and then tighten half a turn to feel slight resistance (should occur at the same time as the first method). Once satisfied that both of these agree I tighten and turn 1/4 of a turn for setting to zero lash.
lifters do not need to be pumped up for this to work.

[Bob]

i was taught to let them sit in oil covering them overnight and drop them in like you would normally.  never heard anything about preload on hydraulic lifters.

Tried that on the current cam and took forever to start. I let them sit 2 days in oil.

[Bob]

Pretty standard, drop them in a cup of oil for a minute and let them sit and soak. drop them in.
I generally use two methods to ensure I get it right for each lifter.
First grasping the head of the rocker at the valve-tip and bouncing it up and down while I slowly tighten the lash until I don't feel any free space. Then grasping the pushrod between two fingers and twisting it side to side as I loosen 1/2 a turn, and then tighten half a turn to feel slight resistance (should occur at the same time as the first method). Once satisfied that both of these agree I tighten and turn 1/4 of a turn for setting to zero lash.
lifters do not need to be pumped up for this to work.

I get most of what you are saying but could you brake it down a little more? How do you make it bounce?
Thank you.
Bob

[aifilaw]

usually I get her a tube top and one of those exercise trampolines, a beer and an easy chair...


grab the tip of the rocker where it rests on the valve, and gently pull up and down, in the direction the valve travels, you will of course feel it bump when it hits the valve on one side, and takes up the slack as it hits the pushrod which in turn hits the top of the lifter.

[firefighter3931]

Bob, do you have adjustable rocker arms on this 440 ? As far as oiling the lifters i just lube up the lifter faces with the moly paste and install them dry. Then i install the pushrods and rocker arms and tighten everything down....then i pour a qt of oil over the lifters and let them fill up after they're preloaded. Once the engine fires the oiling system will replace any amount of oil that might be needed for proper operation. 

Make sure you use a good oil and proper additive with lots of ZZDP to protect the cam and lifters. Brad Penn makes an excellent breakin oil. I also use their racing oil which has lots of extreme pressure additives.



Ron

[Bob]

Bob, do you have adjustable rocker arms on this 440 ? As far as oiling the lifters i just lube up the lifter faces with the moly paste and install them dry. Then i install the pushrods and rocker arms and tighten everything down....then i pour a qt of oil over the lifters and let them fill up after they're preloaded. Once the engine fires the oiling system will replace any amount of oil that might be needed for proper operation. 

Make sure you use a good oil and proper additive with lots of ZZDP to protect the cam and lifters. Brad Penn makes an excellent breakin oil. I also use their racing oil which has lots of extreme pressure additives.



Ron

It's the stock 400 Ron. I don't want to ruin the new cam and lifters you recomended so this time I want to do it right. What is ZZDP?
Thanks
Bob

[firefighter3931]

With the stock valvetrain the preload will be set when you install the rockers/pushrods and torque the shafts to 25ftlbs. 

ZZDP is Zinc....you need it with a flat tappet cam. Read the sticky at the top of the page....lots of good info. In a nutshell ; you need good oil with an EP additive or your new cam will go flat. This is critical. The stupid EPA is responsible for this mess ! 



Ron

[Bob]

With the stock valvetrain the preload will be set when you install the rockers/pushrods and torque the shafts to 25ftlbs. 

ZZDP is Zinc....you need it with a flat tappet cam. Read the sticky at the top of the page....lots of good info. In a nutshell ; you need good oil with an EP additive or your new cam will go flat. This is critical. The stupid EPA is responsible for this mess ! 



Ron

Thank You Mr. Ron